| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery charging protection circuit and a power supply device for shortening a wafer testing time. SOLUTION: A battery state monitoring circuit monitoring a battery state of a secondary battery and outputting a battery state detecting signal, an oscillation circuit outputting an output signal CLK in response to the battery state monitoring signal, a dividing circuit outputting a signal divided in response to the output signal CLK, a logic circuit outputting a signal in response to the signal from the dividing circuit, a first terminal with the output signal CLK inputted, a second terminal with the signal from the logic circuit inputted, and an outer testing circuit connected to the first and the second terminals are provided, and the first terminal is connected with the input of the oscillating circuit. COPYRIGHT: (C)2004,JPO
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